package com.xhd.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.xhd.reggie.common.R;
import com.xhd.reggie.common.BaseContext;
import lombok.extern.slf4j.Slf4j;

import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@Slf4j
@WebFilter(filterName = "LoginCheckFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {

    //路径匹配器，支持通配符


    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login",
                "/doc.html",
                "/webjars/**",
                "/swagger-resources",
                "/v2/api-docs"
        };

        boolean check = check(urls, requestURI);

        if (check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("employee")!= null){

            log.info("用户id为{}",request.getSession().getAttribute("employee"));
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
//            long id = Thread.currentThread().getId();
//            log.info("用户id为{}",id);
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("user")!= null){

            log.info("用户id为{}",request.getSession().getAttribute("user"));
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
//            long id = Thread.currentThread().getId();
//            log.info("用户id为{}",id);
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;

    }

    public boolean check(String[] urls,String requestURL){
       for(String url : urls){
           boolean match = PATH_MATCHER.match(url, requestURL);
           if (match){
               return true;
           }
       }
       return false;
    }
}
